Laars Pennant PNCP Installation And Operation Instructions Manual - page 6
LAARS Heating Systems
Page 6
The dimensions and requirements that are shown
in Table 2 should be met when choosing the locations
for the appliance:
Required
Recommended
Appliance
Clearance From
Service Access
Surface
Combustible Material
Clearance
inches
cm
inches
cm
Left Side
1
2.5
24
61
Right Side
1
2.5
24
61
Top
1
2.5
12
30
Back
1
2.5
**
12**
30**
Front
1
2.5
36
91
Vertical
(Category 1)
6*
15.2*
Vent
Horizontal
per UL1738 venting
(Category 3)
system supplier’s
Vent
instructions
*1" (2.5cm) when b-vent is used.
**When vent and/or combustion air connects to the back,
recommended clearance is 36" (91cm).
Table 2. Clearances.
1.6 Locating Heater with Respect to Pool
System Loop
For the best results, the Pennant should be
located within 15 feet (4.6m) of the pool system loop.
The pump is sized for 30 feet (9.1m) of piping.
If the appliance must be installed with longer
piping runs, then larger diameter piping shall be used.
Consult the factory for assistance.
1.7 Locating Appliance for Correct
Horizontal Vent/Ducted Air Distance
From Outside Wall
The forced draft combustion air blower/blowers
in the appliance has/have sufficient power to pull air
and vent properly when the following guidelines for
horizontal air and vent are followed (see Table 1).
NOTE: On models 750-2000, the vent collar size is
larger than the size of the vent pipe that can be used.
Side wall vent terminals for these sizes are shipped
with replacement vent collars, to accommodate
horizontal vent sizes. Vent collar size and horizontal
pipe diameters can be found in Table 1. The larger
vent collar size is to accommodate Category I
(vertical) vent systems.
NOTE: When located on the same wall, the Pennant
combustion air intake terminal must be installed a
minimum of 12" (30cm) below the exhaust vent
terminal and separated by a minimum of 36 inches
(91cm) horizontally.
The air intake terminal must be installed high
enough to avoid blockage from snow, leaves and other
debris. Never obtain combustion air from the pool
area. Corrosion of and/or damage to the pool heater
may result.
SECTION 2.
Venting and Combustion Air
2.1 Combustion Air
Pennant pool heaters must have provisions for
combustion and ventilation air in accordance with
section 5.3, Air for Combustion and Ventilation, of the
National Fuel Gas Code, ANSI Z223.1, or Sections
7.2, 7.3 or 7.4 of CAN/CGA B149, Installation Codes,
or applicable provisions of the local building codes.
A Pennant appliance may receive combustion air
from the space in which it is installed, or it can be
ducted directly to the unit from the outside.
Ventilation air must be provided in either case. Never
obtain combustion air from the pool area. Corrosion of
and/or damage to the pool heater may result.
2.1.1 Combustion Air From Room
In the United States, the most common
requirements specify that the space shall communicate
with the outdoors in accordance with method 1 or 2,
which follow. Where ducts are used, they shall be of
the same cross-sectional area as the free area of the
openings to which they connect.
Method 1: Two permanent openings, one
commencing within 12 inches (30 cm) of the top and
one commencing within 12 inches (30 cm) of the
bottom, of the enclosure shall be provided. The
openings shall communicate directly, or by ducts, with
the outdoors or spaces that freely communicate with
the outdoors. When directly communicating with the
outdoors, or when communicating to the outdoors
through vertical ducts, each opening shall have a
minimum free area of 1 square inch per 4000 Btu/hr
(5.5 square cm/kW) of total input rating of all
equipment in the enclosure. When communicating to
the outdoors through horizontal ducts, each opening
shall have a minimum free area of not less than
1 square inch per 2000 Btu/hr (11 square cm/kW) of
total input rating of all equipment in the enclosure.
Table 3 shows data for this sizing method, for each
Pennant model.
Method 2: One permanent opening,
commencing within 12 inches (30 cm) of the top of
the enclosure, shall be permitted. The opening shall
directly communicate with the outdoors or shall
communicate through a vertical or horizontal duct to
the outdoors or spaces that directly communicate with
the outdoors and shall have a minimum free area of
1 square inch per 3000 Btu/hr (7 square cm/kW) of the